Air-injector.



PATENTED OCT. -25, 1904.

- T. H. STAMP.

AIR INJECTOR.

APPLICATION TILED JULY 6, 1903.

H0 MODEL.

%Znesses: Wfivnivr Patented October 25, 1904.

FFIE.

THOMAS H. STAMP, OF BUFFALO, NEW YORK, ASSIGNOR TO JOHN G STAMP, OF BUFFALO, NEWV YORK.

AIR-INJECTOR.

SPECIFICATION forming part of Letters Iatent N0. 773,236, d e er 25, 1904.

Application filed July 6, 1903. Serial No. 164,290. (No model.)

To all whom it may concern.-

Be itknown that I, THoMAs H. STAMP, a citi zen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Air-Injectors, of which the following isa specification.

This invention relates to an air-injector designed more especially for use in connection with a hydraulic elevator system of the kind shown and described inLetters Patent of the United States No. 459,209, granted to John G. Stamp September 8, 1891, the purpose of the injector, as fully set forth in said patent, being to mix-air with the water pumped into the compression-tank for restoring the loss of air in the latter.

The object of my present invention is to provide an improved injector of this class which is simple and'inexpensive in construction and which produces a powerful suction, so as to mix a large volume of air with the water delivered into the compression-tank and restore the loss of air in a short period of time.

In the accompanying drawings, Figure 1 is a vertical central section of an air-injector embodying my invention. zontal section thereof in line 2 2, Fig. 1.

Similar letters of reference indicate corresponding parts in both figures.

A indicates the upright shell or casing of the injector,provided at one side with a branch B, adapted to be connected by a pipe with .the water-space of the compression-tank of the hydraulic elevator plant or with the dischargepipe of the pump leading to the compressiontank, so as to deliver a current of water under pressure to the injector. At its lower end the casing is provided with an outlet or discharge branch C, adapted to be connected with the suction-pipe of the pump or directly with the suction-chamber of the pump. The compression-tank, the pump, and the water supply and delivery pipes of the injector are not shown in the drawings and may be arranged as shown in the Letters Patent hereinbefore referred to.

At its upper end the casing is provided with an air-inlet D, preferably controlled by a regu- Fig. 2 is a hori-' is screwed 1nto said branch.

lating-valve comprising an open casing or cage E and a valve-head 0, adapted to close against a seat 6' and having a screw-threaded stemre provided with a hand-wheel'for turn- .ing it.

A nozzle having four jet-openings, asshown in the drawings, produces satisfactory results;

but a greater or less number may be employed, if desired. The jet-openings are slightly flared toward their outer ends, as shown.

The casing is preferably provided at the upper end of its screw-threaded discharge branch C with an inwardly-extending annular flange i, which forms a stop for the pipe which The upper side of this stOp flange is beveled, as shown at t", for directing the incoming air inwardly against the water-jets.

In theoperation of the injector upon opening the air-supply valve 6 and admitting water under pressure to the injector-casing the water issues in a cluster of jets through the openings it of the nozzle F, producing a vacuum at the mouth of the nozzle whereby air is drawn into the casing and through the annular space 9 and commingled with the water. The aerated water is conducted to the pump of the elevator plant and is thence delivered into the compression-tank, thus increasing the volume of air in this tank and restoring any loss of air.

By thus delivering the water into the central portion of the injector-casing in a cluster of jets and supplying the air around the outer side of the central water-nozzle a prompt and very powerful suction is produced at the mouth of the nozzle, and as the spray formed by the several jets presents a large area to the air and is completely enveloped thereby it takes up a larger quantity of air, increasing the power and the mixing capacity of the injector to the maximum degree.

1 claim as my invention An air-injector for a hydraulic elevator systern, comprising a casing having an air-inlet at its top, a regulating-valve applied to said inlet, a water-inlet branch formed integral with the side of the casing and adapted to be connected with a conduit containing water under pressure, a water-nozzle formed integral with the casing and arranged centrally and lengthwise therein, said nozzle forming a continuation of the water-inlet branch and being separated from the wall of the casing by an intervening air-space, and a screw-plug applied to the front end of the water-nozzle and having a plurality of jet-openings, substantially as set forth.

l/Vitness my hand this 3d day of July, 1903.

THOMAS H. STAMP.

Witnesses:

CARL F. GEYER, EMMA M. GRAHAM. 

